CPC G02B 5/20 (2013.01) [G01F 23/2921 (2013.01)] | 22 Claims |
1. A sensing system for determining a liquid level comprising:
a laser sensor having laser signal transmission and reception lenses thereof and operative to measure a time-of-flight distance of laser light between said laser sensor and said liquid level; and
a first optical baffle tube positioned adjacent either one of said laser signal transmission and reception lenses, said first optical baffle tube having a plurality of internal baffle rings operative to attenuate off-axis laser light emitted or received respectively from said either one of said laser signal transmission or reception lenses.
|